Envelop.



EL HEYBR.

ENVELOP. 7 APPLICATION FILED AUG. 12, 1905.

914,274, Patented Mar. 2, 1909.

%@ qa\ 51mm WWW E l 7- yer' C 'azwm THE NORRIS PETERS co., wxsumarcw. n.c

UNITED STATE EMIL HEYER, OF HAGKENSAOK, NEW JERSEY.

ENVELOP.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed August 12, 1905. Serial No. 273,941.

To all whom it may concern:

Be it known that I, EMIL HEYER, a citizen of the United States ofAmerica, residing at Hackensack, in the county of Bergen and State ofNew Jersey, have invented new and useful Improvements in Envelops, ofwhich the following is a specification.

This invention relates to an improved construction of envelop.

The object of the invention is to provide a construction which obviatesthe necessity of forming the envelop from a blank having a plurality offlaps which are folded over upon the body and pasted together, as in theordinary construction, and which not only simplifies the operation ofmanufacture but to a material extent prevents waste of material andthereby decreases the cost of production.

In the accompanying drawings illustrating the invention,-Figure 1 is alongitudinal section through the completed envelop, the section beingtaken on the plane indicated by the line 11 of Fig. 2; Fig. 2 is acentral transverse section on the line 22 of Fig. 1 Fig. 3 is a detailsection through one of the end seams of the envelop on the line 33 ofFig. 1; and Fig. 4. is a plan view of the blank from which the envelopis made.

In carrying my invention into practice, I provide a construction ofenvelop in which all the parts are integrally connected in a homogeneousstructure, thus obviating the necessity of making bottom and cornerflaps and pasting the same together. This envelop comprises a body Aprovided with a sealing flap A, and a back B joined at its ends to theends of the body and which may be integral with the lower edge of thebody or joined thereto through the same process of uniting the sideedges thereof with the side edges of the back.

In carrying the invention into practice a suitable blank is firstproduced from a sheet of paper in a plastic condition, preferably whi estill damp as it comes from the rolls of a paper making machine. Thisblank is preferably of the form shown in Fig. 4;, in which j the back Bis cut out as an integral part with the body and sealing flap and informing the envelop the back B is folded over upon the body on thedotted line a and the end edges 1) and b of the back joined to the endedges a and a of the body by using a suitable seaming or compressingdevice, by which the edges are forced together under pressure, suchpressure causing said edges, owing to the still plastic condition of thepaper, to combine with their particles intermingling, thus producingpractically homogeneous edge unions a, joining the parts together toform the completed envelop.

The operation may be 1performed by hand or machine, and as a resu t anenvelop will be produced which is entirely free from pasted flaps and inwhich the body of the envelop as a whole is composed of a homogeneouswall of paper.

It will be seen that this construction and manner of making the envelopnot only simplifies the operation of manufacture, but also obviates theloss of material and increased cost of production resulting from theusual method of forming the back of the envelop of bottom and side flapsand pasting the same together.

Having thus described the invention, what is claimed as new, is

As a new and improved article of manufacture a mailing envelopconstructed from a blank of plastic paper stock, said blank comprising abody with a sealing flap and a rectangular back, said back being foldedover on the body so that the opposite side edges of the body and backwill be joined together by compression while the material of the blankis in a plastic state so as to permit said edges to intermingle andunite in a homogeneous manner without the aid of adhesive material.

In testimony whereof, I afiiX my signature in presence of two witnesses.

EMIL HEYER.

Witnesses:

Monrrz KIROHBERGER, AUGUST METZELER.

